I may recommend for reading eInk technology (Kindle, Kobo, nook, sony ...) instead of flat screen (Kindle fire, iPad, Nexus 7)... the level of confort is clearly better on dedicated eInk reader devices.
For the WSJ, There is indeed no perfect solution... if I was you I would move first for Calibre tools or Website like webtoread.com (WSJ Page) before moving to a more expensive subscription solution.